Chainguard API v2

Chainguard API v2 is the current REST API for the Chainguard platform. Endpoints cover Identity and Access Management (IAM), image registry operations, and vulnerability data under /iam/v2beta1/, /registry/v2beta1/, and /vulnerabilities/v2beta1/. v2 introduces cursor-based pagination, server-side ordering, consistent resource patterns, and structured error responses.